Data receiving method and device, and data sending method and device

Abstract

Embodiments of the present application provide a data receiving method and device, and a data sending method and device. The method comprises: receiving first indication signaling, wherein the first indication signaling indicates activation of a first group of TCI states for a first cell; upon receiving the first indication signaling, receiving a cell switch command, wherein the cell switch command instructs a terminal device to switch to a target cell and the cell switch command indicates a first TCI state; if the target cell is the first cell and the first TCI state is not a subset of the first group of TCI states, the terminal device then deactivating the first group of TCI states.

Description

Data receiving and data sending method and device Technical Field

[0001] The embodiments of the present application relate to the field of communication technologies. Background Art

[0002] The 3GPP standardization organization is studying Layer 1 / Layer 2 Triggered Mobility (LTM) during the standardization of Release 18 (Rel-18). Rel-18 LTM includes measurement, reporting, beam indication, cell handover, etc.

[0003] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of this application and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are explained in the background technology part of this application.

[0004] Summary of the Invention

[0005] Rel-18 studies Layer 1 / Layer 2 Triggered Mobility (LTM). For Rel-18 LTM, the goal is to reduce handover interruption by cell switching based on Layer 1 / Layer 2 signaling (Layer 1 / Layer 2 triggered), so as to switch from the serving cell (source cell) to the target cell faster. The target cell is the cell after switching, which can be a serving cell or a non-serving cell. Handover interruption refers to the time from the receipt of the cell switch command by the terminal device to the first successful completion of uplink or downlink transmission between the terminal device and the target cell. Compared with the traditional cell switching based on Layer 3 signaling, the cell switching based on Layer 1 / Layer 2 signaling can further reduce handover interruption.

[0006] Rel-18 LTM includes measurement, reporting, beam indication, cell switching, etc. The terminal device measures the System Synchronization Block (SSB) of the candidate cell and reports the measured Layer 1-Reference Signal Receiving Power (L1-RSRP) to the source cell. The source cell can activate the Transmission Configuration Indicator (TCI) state of the candidate cell for the terminal device and then send a cell switching command to instruct the terminal device to switch to a candidate cell (i.e., the target cell). The cell switching command also indicates the TCI state used in the target cell.

[0007] However, the inventors found that after a terminal device receives a cell switching command indicating one (a pair of) TCI states, or receives an indication signaling to activate a group of TCI states, how to handle the TCI state that has been activated before receiving the cell switching command, including what assumptions to make about the previously activated TCI state, is still a problem that needs to be solved, and there is still a lack of regulations on the behavior of relevant terminal devices.

[0008] Therefore, if the terminal device behavior is not specified, the terminal device will have ambiguity about how to update or maintain the activated TCI state, which will lead to problems such as waste of device storage space, cell handover failure, or data transmission failure after cell handover.

[0009] To address at least one of the above problems, embodiments of the present application provide a method and apparatus for receiving and sending data.

[0010] According to one aspect of an embodiment of the present application, a data receiving method is provided, which is applied to a terminal device, and the method includes:

[0011] receiving a first indication signaling, wherein the first indication signaling activates a first group of TCI states for a first cell;

[0012] receiving a cell handover command after receiving the first indication signaling, wherein the cell handover command instructs the terminal device to switch to a target cell, and the cell handover command indicates a first TCI state;

[0013] In which, when the target cell is the first cell and the first TCI state is not a subset of the first group of TCI states, the terminal device deactivates the first group of TCI states.

[0014] According to another aspect of an embodiment of the present application, a data sending method is provided, which is applied to a network device, and the method includes:

[0015] Sending a first indication signaling, wherein the first indication signaling activates a first group of TCI states for the first cell;

[0016] After sending the first indication signaling, sending a cell handover command, wherein the cell handover command indicates that the terminal device switches to a target cell, and the cell handover command indicates a first TCI state;

[0017] In which, when the target cell is the first cell and the first TCI state is not a subset of the first group of TCI states, the terminal device deactivates the first group of TCI states.

[0018] According to another aspect of an embodiment of the present application, a data receiving apparatus is provided, configured in a terminal device, wherein the data receiving apparatus includes:

[0019] a receiving unit configured to receive a first indication signaling, wherein the first indication signaling is an activation of a first group transmission configuration indication state (TCI state) for a first cell;

[0020] The receiving unit receives a cell handover command after receiving the first indication signaling, wherein the cell handover command instructs the terminal device to switch to a target cell, and the cell handover command indicates a first transmission configuration indication state (TCI state);

[0021] In which, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is not a subset of the first group of transmission configuration indication states (TCI states), the terminal device deactivates the first group of transmission configuration indication states (TCI states).

[0022] According to another aspect of an embodiment of the present application, a data sending device is provided, configured in a network device, the data sending device comprising:

[0023] a sending unit configured to send a first indication signaling, wherein the first indication signaling is activating a first group transmission configuration indication state (TCI state) for a first cell;

[0024] The sending unit sends a cell handover command after sending the first indication signaling, wherein the cell handover command indicates that the terminal device switches to a target cell, and the cell handover command indicates a first transmission configuration indication state (TCI state);

[0025] In which, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is not a subset of the first group of transmission configuration indication states (TCI states), the terminal device deactivates the first group of transmission configuration indication states (TCI states).

[0026] According to another aspect of an embodiment of the present application, a communication system is provided, including:

[0027] A network device, sending a first indication signaling, wherein the first indication signaling activates a first group of transmission configuration indication states (TCI states) for a first cell; and the network device sending a cell handover command after sending the first indication signaling, wherein the cell handover command indicates that the terminal device switches to a target cell, and the cell handover command indicates the first transmission configuration indication state (TCI state);

[0028] A terminal device, which receives the first indication signaling, and receives a cell handover command after receiving the first indication signaling;

[0029] In which, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is not a subset of the first group of transmission configuration indication states (TCI states), the terminal device deactivates the first group of transmission configuration indication states (TCI states).

[0030] One of the beneficial effects of the embodiments of the present application is that: the terminal device receives a first indication signaling, wherein the first indication signaling activates a first group of TCI states for a first cell; the terminal device receives a cell switching command after receiving the first indication signaling, wherein the cell switching command instructs the terminal device to switch to a target cell, and the cell switching command indicates a first TCI state, wherein, in the case where the target cell is the first cell and the first TCI state is not a subset of the first group of TCI states, the terminal device deactivates the first group of TCI states. Thus, in the case where the first TCI state indicated by the cell switching command is not a subset of the first group of TCI states that was previously activated, the terminal device deactivates the activated first group of TCI states, which can clarify the behavior of the terminal device, reduce the complexity of the terminal device, save storage space of the terminal device, and is also beneficial for the terminal device to successfully complete the cell switching and data transmission after the switching, thereby improving the reliability or throughput of data transmission.

[0031] With reference to the following description and accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the manner in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope. Within the spirit and scope of the appended claims, the embodiments of the present application include many variations, modifications and equivalents.

[0032] Features described and / or illustrated with respect to one embodiment may be used in the same or similar manner in one or more other embodiments, combined with features in other embodiments, or substituted for features in other embodiments.

[0033] It should be emphasized that the term "include / comprising" when used herein refers to the presence of features, integers, steps or components, but does not exclude the presence or addition of one or more other features, integers, steps or components. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The elements and features described in one figure or one embodiment of the present application can be combined with the elements and features shown in one or more other figures or embodiments. In addition, in the accompanying drawings, similar reference numerals represent corresponding parts in several figures and can be used to indicate corresponding parts used in more than one embodiment.

[0035] FIG1 is a schematic diagram of a communication system according to an embodiment of the present application;

[0036] FIG2 is a schematic diagram of a data sending method according to an embodiment of the present application;

[0037] FIG3 is an example diagram of a first indication signaling and a cell switching command according to an embodiment of the present application;

[0038] FIG4 is another example diagram of the first indication signaling and the cell switching command according to an embodiment of the present application;

[0039] FIG5A is an example diagram of a first indication signaling, a second indication signaling, and a cell handover command according to an embodiment of the present application;

[0040] FIG5B is another example diagram of the first indication signaling, the second indication signaling, and the cell handover command according to an embodiment of the present application;

[0041] FIG6A is an example diagram of the first indication signaling, the third indication signaling, and the cell handover command according to an embodiment of the present application;

[0042] FIG6B is an example diagram of the second indication signaling, the fourth indication signaling, and the cell handover command according to an embodiment of the present application;

[0043] FIG7 is an example diagram of the fifth indication signaling according to an embodiment of the present application;

[0044] FIG8 is a schematic diagram of a data sending method according to an embodiment of the present application;

[0045] FIG9 is a schematic diagram of a data receiving device according to an embodiment of the present application;

[0046] FIG10 is a schematic diagram of a data sending device according to an embodiment of the present application;

[0047] FIG11 is a schematic diagram of the structure of a network device according to an embodiment of the present application;

[0048] FIG12 is a schematic diagram of a terminal device according to an embodiment of the present application. DETAILED DESCRIPTION

[0049] The above and other features of the present application will become apparent through the following description with reference to the accompanying drawings. In the description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, which illustrate some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents that fall within the scope of the appended claims.

[0050] In the embodiments of the present application, the terms "first", "second", etc. are used to distinguish different elements from the name, but do not indicate the spatial arrangement or temporal order of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the associated listed terms. The terms "comprising", "including", "having", etc. refer to the presence of the stated features, elements, components or components, but do not exclude the presence or addition of one or more other features, elements, components or components.

[0051] In the embodiments of this application, the singular forms "a," "the," etc. include plural forms and should be broadly understood to mean "a" or "a type" rather than being limited to "one." Furthermore, the term "said" should be understood to include both singular and plural forms, unless the context clearly indicates otherwise. Furthermore, the term "according to" should be understood to mean "at least in part based on...", and the term "based on" should be understood to mean "at least in part based on...", unless the context clearly indicates otherwise.

[0052] In the embodiments of the present application, the term "communication network" or "wireless communication network" may refer to a network that complies with any of the following communication standards, such as Long Term Evolution (LTE), enhanced Long Term Evolution (LTE-A, LTE-Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed ​​Packet Access (HSPA), etc.

[0053] Furthermore, communication between devices in the communication system may be carried out according to communication protocols of any stage, for example, including but not limited to the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G and 5G, New Radio (NR), etc., and / or other communication protocols currently known or to be developed in the future.

[0054] In the embodiments of the present application, the term "network device" refers to, for example, a device in a communication system that connects a terminal device to the communication network and provides services to the terminal device. Network devices may include, but are not limited to, the following devices: base station (BS), access point (AP), transmission reception point (TRP), broadcast transmitter, mobile management entity (MME), gateway, server, radio network controller (RNC), base station controller (BSC), etc.

[0055] Base stations may include, but are not limited to, NodeB (NB), evolved NodeB (eNodeB or eNB), and 5G base stations (gNB), among others. They may also include remote radio heads (RRHs), remote radio units (RRUs), relays, or low-power nodes (e.g., femeto, pico, etc.). The term "base station" may include some or all of their functions, and each base station may provide communication coverage for a specific geographic area. The term "cell" may refer to a base station and / or its coverage area, depending on the context in which the term is used.

[0056] In the embodiments of the present application, the term "user equipment" (UE) or "terminal equipment" (TE) refers to, for example, a device that accesses a communication network through a network device and receives network services. A terminal device can be fixed or mobile and may also be referred to as a mobile station (MS), a terminal, a subscriber station (SS), an access terminal (AT), a station, and so on.

[0057] Among them, terminal devices may include but are not limited to the following devices: cellular phones, personal digital assistants (PDAs), wireless modems, wireless communication devices, handheld devices, machine-type communication devices, laptop computers, cordless phones, smart phones, smart watches, digital cameras, etc.

[0058] For another example, in scenarios such as the Internet of Things (IoT), the terminal device can also be a machine or device for monitoring or measurement, including but not limited to: machine type communication (MTC) terminal, vehicle-mounted communication terminal, device-to-device (D2D) terminal, machine-to-machine (M2M) terminal, and so on.

[0059] In addition, the term "network side" or "network device side" refers to one side of the network, which can be a base station or one or more network devices as described above. The term "user side" or "terminal side" or "terminal device side" refers to the user or terminal side, which can be a UE or one or more terminal devices as described above. Unless otherwise specified herein, "device" can refer to either network equipment or terminal equipment.

[0060] The following describes the scenarios of the embodiments of the present application through examples, but the present application is not limited thereto.

[0061] Figure 1 is a schematic diagram of a communication system according to an embodiment of the present application, which schematically illustrates a situation taking a terminal device and a network device as an example. As shown in Figure 1 , a communication system 100 may include a first network device 101, a second network device 102, and a terminal device 103. For simplicity, Figure 1 only illustrates two network devices and one terminal device as an example, but the embodiment of the present application is not limited to this.

[0062] For example, the first network device 101 is the serving cell (source cell) of the terminal device 103 , and the second network device 102 is the cell after switching (target cell) of the terminal device 103 .

[0063] To implement cell switching based on layer 1 / layer 2, the terminal device measures multiple candidate cells, for example, measuring the layer 1-reference signal receiving power (L1-RSRP) of the system synchronization block (SSB); and reports the measurement results to the source cell, for example, sending a channel state information report (CSI report). The source cell indicates to the terminal device which candidate cell to switch to through a cell switching command (the indicated candidate cell becomes the target cell); and indicates the beam used for uplink and downlink transmission in the target cell after switching, for example, the transmission configuration indication state (TCI state). The source cell, candidate cell, and target cell in Rel-18 LTM all support the Rel-17 unified TCI state (unified TCI). Therefore, the TCI state indicated above is the unified TCI state. For unified TCI, the high-level parameter "unifiedTCI-StateType" can configure whether to use a joint TCI state or a separate TCI state. When the value of the "unifiedTCI-StateType" parameter is 'joint', the TCI state is a joint TCI state; when the value of the "unifiedTCI-StateType" parameter is 'separate', the TCI state is a downlink TCI state and / or an uplink TCI state. The source cell may activate the TCI state of the candidate cell for the terminal device before the cell handover command, and then indicate one (a pair of) activated TCI states in the cell handover command; alternatively, the source cell may indicate one (a pair of) inactivated TCI states in the cell handover command, which is equivalent to the cell handover command directly indicating and activating the TCI state.

[0064] However, the inventors discovered that before the cell handover command, an indication signaling (e.g., MAC CE signaling) can activate a set of TCI states for a candidate cell. Rel-18 LTM supports activating multiple sets of TCI states for multiple candidate cells through multiple indication signaling. The cell handover command then instructs the terminal device to switch to one of the multiple candidate cells (i.e., the target cell), and the cell handover command instructs the terminal device to apply one (a pair of) TCI states ("a combined TCI state" or "a downlink TCI state and an uplink TCI state") in the target cell.

[0065] However, after a terminal device receives a cell switching command indicating one of the above TCI states, or receives an indication signaling to activate another set of TCI states, how to handle the previously activated TCI state, including what assumptions to make about the previously activated TCI state, remains a problem that needs to be solved, and there is still a lack of regulations on the behavior of related devices.

[0066] Therefore, if the terminal device behavior is not specified, the terminal device will have ambiguity about how to update or maintain the activated TCI state, which will lead to waste of device storage space, cell handover failure, or data transmission failure after cell handover.

[0067] To address at least one of the above problems, embodiments of the present application provide a method and apparatus for receiving and sending data.

[0068] Embodiments of the first aspect

[0069] An embodiment of the present application provides a data receiving method, which is applied on a terminal device side.

[0070] FIG2 is a schematic diagram of a data receiving method according to an embodiment of the present application. As shown in FIG2 , the method includes:

[0071] 201. A terminal device receives first indication signaling, where the first indication signaling activates a first group of TCI states for a first cell;

[0072] 202. After receiving the first indication signaling, the terminal device receives a cell handover command, wherein the cell handover command instructs the terminal device to switch to a target cell, and the cell handover command indicates a first TCI state;

[0073] 203. When the target cell is the first cell and the first TCI state is not a subset of the first group of TCI states, the terminal device deactivates the first group of TCI states.

[0074] Therefore, when the first TCI state indicated by the cell switching command is not a subset of the first group of TCI states previously activated, the terminal device deactivates the activated first group of TCI states, which can clarify the behavior of the terminal device, reduce the complexity of the terminal device, save the storage space of the terminal device, and also help the terminal device to successfully complete the cell switching and data transmission after the switching, thereby improving the reliability or throughput of data transmission.

[0075] It is worth noting that FIG2 above is merely a schematic illustration of an embodiment of the present application, using a terminal device as an example, but the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, other operations may be added or some operations may be reduced, and the objects of the aforementioned operations may be adjusted. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG2 above.

[0076] In some embodiments, the terms "corresponding to", "associated with", and "including" can be used interchangeably.

[0077] The following details the "first instruction signaling", "cell handover signaling", and "first cell".

[0078] In some embodiments, the first indication signaling is carried by at least one of the following signaling: media access control control element (MAC access control control element, MAC CE) signaling, downlink control information (Downlink control information, DCI) signaling, or radio resource control (Radio Resource Control, RRC) signaling.

[0079] In some embodiments, the first group of transmission configuration indication states (TCI states) includes at least: at least one joint transmission configuration indication state (TCI state), or at least one downlink transmission configuration indication state (TCI state) and / or at least one uplink transmission configuration indication state (TCI state).

[0080] For example, the higher-level parameter "unifiedTCI-StateType" is used to configure whether the cell uses a joint TCI state or a separate TCI state (downlink TCI state and / or uplink TCI state). For example, the higher-level parameter "unifiedTCI-StateType" is carried through Radio Resource Control (RRC) signaling.

[0081] For example, the first indication signaling is MAC CE signaling, and the MAC CE signaling activates a first group of TCI states for the first cell. For example, when the unifiedTCI-StateType parameter value of the first cell is 'joint', the first group of TCI states activated for the first cell includes, for example, 8 joint TCI states. For example, when the unifiedTCI-StateType parameter value of the first cell is 'separate', the first group of TCI states activated for the first cell includes, for example, "8 downlink TCI states and 8 uplink TCI states" (i.e., 8 pairs of TCI states).

[0082] In some implementations, the first cell includes at least a target cell or a candidate cell.

[0083] For example, the first indication signaling activates the first group of TCI states for a candidate cell (first cell). Afterwards, the cell handover command instructs the terminal device to switch to a candidate cell. If the cell handover command instructs the terminal device to switch to the first cell, then the first cell is both a candidate cell and a target cell, which is equivalent to the first indication signaling activating the first group of TCI states for the target cell. For example, if the cell handover command instructs the terminal device to switch to a candidate cell other than the first cell, then the first cell is only a candidate cell.

[0084] In some embodiments, the terminal device receives a cell switching command after receiving the first indication signaling.

[0085] In some implementations, the cell switching command is carried via Media Access Control Element (MAC CE) signaling.

[0086] For example, the specific signaling format of the MAC CE of the cell switching command can be referred to in the prior art, and this application does not limit this.

[0087] In some embodiments, the cell switching command instructs the terminal device to switch to the target cell, and the cell switching command indicates a first transmission configuration indication state (TCI state).

[0088] In some embodiments, the first transmission configuration indication state (TCI state) includes at least: a joint transmission configuration indication state (TCI state), or a downlink transmission configuration indication state (TCI state) and an uplink transmission configuration indication state (TCI state).

[0089] For example, the cell handover command indicates the first TCI state of the target cell. When the unifiedTCI-StateType parameter value of the target cell is 'joint', the first TCI state includes a joint TCI state. When the unifiedTCI-StateType parameter value of the target cell is 'separate', the first TCI state includes a downlink TCI state and an uplink TCI state (i.e., a pair of TCI states).

[0090] In some embodiments, after receiving the cell switching command, the terminal device applies the first transmission configuration indication state (TCI state) in the target cell.

[0091] For example, when the unifiedTCI-StateType parameter value of the target cell is 'joint', the terminal device applies the first TCI state in the target cell, where the first TCI state is a joint TCI state; when the unifiedTCI-StateType parameter value of the target cell is 'separate', the terminal device applies the first TCI state in the target cell, and the first TCI state is "one downlink TCI state and one uplink TCI state" (i.e., one pair of TCI states).

[0092] The above describes the contents of “first instruction signaling”, “cell handover signaling”, and “first cell”. The following describes the above step 203 and other contents in detail in combination with the specific contents of “first instruction signaling”, “cell handover signaling”, and “first cell”:

[0093] In some embodiments, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is not a subset of the first group of transmission configuration indication states (TCI states), the terminal device deactivates the first group of transmission configuration indication states (TCI states).

[0094] FIG3 is an example diagram of the first indication signaling and the cell switching command according to an embodiment of the present application.

[0095] For example, the first indication signaling is a MAC CE signaling, and the first indication signaling is referred to by the first MAC CE. For example, as shown in Figure 3, the terminal device receives a first MAC CE, and receives a cell switching command after receiving the first MAC CE. The first MAC CE activates a first group of TCI states for the first cell, and the first group of TCI states includes TCI state#1, TCI state#2, and TCI state#3 (for example, when the unifiedTCI-StateType parameter value of the first cell is 'joint', TCI state#1, TCI state#2, and TCI state#3 respectively represent a joint TCI state, and when the unifiedTCI-StateType parameter value of the first cell is 'separate', TCI state#1, TCI state#2, and TCI state#3 respectively represent "a downlink TCI state and an uplink TCI state" (i.e., 1 pair of TCI states)).

[0096] For example, the cell switching command instructs the terminal device to switch to the target cell and apply the first TCI state in the target cell. For example, the indicated first TCI state includes TCI state#4 (for example, when the unifiedTCI-StateType parameter value of the target cell is 'joint', TCI state#4 represents a joint TCI state; when the unifiedTCI-StateType parameter value of the target cell is 'separate', TCI state#4 represents "a downlink TCI state and an uplink TCI state" (i.e., 1 pair of TCI states)).

[0097] For example, when the target cell is the first cell and the TCI state#4 indicated by the cell switching command is not any TCI state in the first group of TCI states, that is, the first TCI state is not a subset of the first group of TCI states, the terminal device deactivates the first group of TCI states, that is, deactivates TCI state#1, TCI state#2 and TCI state#3 after receiving the cell switching command.

[0098] For example, although the network device (source cell) has activated a set of TCI states (the first set of TCI states) for the first cell before sending the cell handover command, when sending the cell handover command, the network device finds a more suitable TCI state #4 (the first set of TCI states), and thus instructs the terminal device to apply the new TCI state #4 (the first set of TCI states) in the target cell. Because the activated first set of TCI states is no longer applicable (or has expired), the terminal device no longer retains the activated first set of TCI states, that is, deactivates the first set of TCI states.

[0099] For example, "deactivate" can be replaced by "not retain", or "release", or "invalid", or "ignore", etc., and this application does not limit this.

[0100] Therefore, since the change in TCI state indicates that the movement of the terminal device makes the activated TCI state no longer applicable, the terminal device no longer retains the activated TCI state, which can reduce the complexity of the terminal device and reduce the storage overhead of the terminal device.

[0101] In some implementations, after receiving the cell handover command, the first TCI state is applied in the target cell.

[0102] For example, after receiving the cell switching command, the terminal device retains and / or applies the first TCI state.

[0103] For example, as shown in Figure 3, after receiving the cell switching command, the terminal device retains TCI state #4 and applies the TCI state #4, for example, performing uplink and downlink transmission between the terminal device and the new service cell (which is also the target cell) according to the TCI state #4; for example, as to how the terminal device uses a certain TCI state to perform uplink and downlink transmission in a cell, reference can be made to existing standards, and this application does not impose any restrictions on this.

[0104] For example, "retain" can be replaced by "maintain", or "keep", or "save", etc., and this application does not limit this.

[0105] Therefore, the terminal device applies the first TCI state indicated by the cell switching command to track the changes in the beam more timely and ensure that a better beam is always used for data transmission with the target cell.

[0106] In some embodiments, the method further includes: when the target cell is the first cell and the first transmission configuration indication state (TCI state) is a subset of the first group of transmission configuration indication states (TCI states), after receiving the cell handover command, retaining the first group of transmission configuration indication states (TCI states).

[0107] FIG4 is another example diagram of the first indication signaling and the cell switching command according to an embodiment of the present application.

[0108] For example, the first indication signaling is MAC CE signaling, and the first MAC CE is used to refer to the first indication signaling.

[0109] For example, as shown in FIG. 4 , the difference from FIG. 3 is that the first TCI state indicated by the cell handover command includes TCI state #2, that is, TCI state #2 indicated by the cell handover command is a TCI state in the first group of TCI states, that is, the first TCI state is a subset of the first group of TCI states.

[0110] For example, when the target cell is the first cell and the TCI state#2 indicated by the cell switching command is a subset of the first group of TCI states, the terminal device retains the first group of TCI states, that is, retains TCI state#1, TCI state#2, and TCI state#3 after receiving the cell switching command. For example, TCI state#1, TCI state#2, and TCI state#3 are like TCI states activated in the new serving cell (target cell) and can continue to be used in the beam management of the target cell. For example, the terminal device applies TCI state#2 after the cell switching command. As the terminal device moves, the network device (target cell) may find that TCI state#3 is more suitable than TCI state#2, and thus indicates TCI state#3 in TCI state#1, TCI state#2, and TCI state#3 through signaling such as DCI.

[0111] As a result, the new serving cell (target cell) does not need to reactivate the TCI state for the terminal device. The terminal device can continue to use the TCI state that has been activated during the cell switching process, thereby saving the preparation time for activating the TCI state and applying the appropriate TCI state more quickly.

[0112] In some embodiments, the method further includes: receiving a second indication signaling before receiving the cell switching command, wherein the second indication signaling activates a second group transmission configuration indication state (TCI state) for the second cell; wherein the second indication signaling and the first indication signaling are included in the same protocol data unit (MAC Protocol Data Unit, MAC PDU), or the second indication signaling and the first indication signaling are included in different protocol data units (MAC Protocol Data Unit, MAC PDU).

[0113] In some embodiments, the second group of transmission configuration indication states (TCI states) includes at least: at least one joint transmission configuration indication state (TCI state), or at least one downlink transmission configuration indication state (TCI state) and / or at least one uplink transmission configuration indication state (TCI state).

[0114] In some implementations, the second indication signaling is carried by at least one of the following signalings: media access control element (MAC CE) signaling, downlink control information (DCI) signaling, or radio resource control (RRC) signaling.

[0115] For example, the second indication signaling is also MAC CE signaling, and the MAC CE signaling activates a second group of TCI states for the second cell. For example, when the unifiedTCI-StateType parameter value of the second cell is 'joint', the second group of TCI states activated for the second cell includes, for example, 8 joint TCI states. For example, when the unifiedTCI-StateType parameter value of the second cell is 'separate', the second group of TCI states activated for the second cell includes, for example, "8 downlink TCI states and 8 uplink TCI states" (i.e., 8 pairs of TCI states).

[0116] In some implementations, the second cell includes at least a candidate cell, and the second cell and the first cell are different cells.

[0117] For example, the second indication signaling activates the second group of TCI states for a candidate cell, and the candidate cell is a different cell from the first cell (target cell or candidate cell).

[0118] In some embodiments, the terminal device receives the second indication signaling before receiving the first indication signaling, after receiving the first indication signaling, or when receiving the first indication signaling.

[0119] For example, the terminal device receives the second indication signaling before receiving the first indication signaling, or the terminal device receives the second indication signaling after receiving the first indication signaling and before receiving the cell switching command, or the terminal device receives the first indication signaling and the second indication signaling at the same time (for example, the first indication signaling and the second indication signaling are included in the same MAC PDU).

[0120] The following describes the “second instruction signaling” in detail with reference to a specific implementation method:

[0121] For example, before sending a cell switching command, the source cell may activate TCI state for one or more candidate cells through MAC CE, wherein one MAC CE activates a group of TCI states (including one or more (one or more pairs) of TCI states) for one candidate cell, wherein a field of the MAC CE indicates the candidate cell. In order to activate TCI state for multiple candidate cells, the source cell needs to send multiple MAC CEs. For example, multiple MAC CEs may be located in the same MAC PDU, thereby being sent to the terminal device at one time, that is, multiple MAC CEs are sent at one time, or multiple MAC CEs may be located in different MAC PDUs, thereby being sent to the terminal device multiple times, that is, one MAC CE is sent each time. The following examples illustrate how the second MAC CE is carried:

[0122] Figure 5A is an example diagram of the first indication signaling, the second indication signaling, and the cell switching command in an embodiment of the present application; Figure 5B is another example diagram of the first indication signaling, the second indication signaling, and the cell switching command in an embodiment of the present application.

[0123] For example, the first indication signaling is MAC CE signaling, and the first MAC CE is used to refer to the first indication signaling; the second indication signaling is MAC CE signaling, and the second MAC CE is used to refer to the second indication signaling.

[0124] For example, as shown in Figure 5A, the source cell needs to send a first MAC CE and a second MAC CE to activate a first group of TCI states for the first cell and a second group of TCI states for the second cell, respectively. For example, as shown in Figure 5A, the first group of TCI states activated for the first cell includes: TCI state#1-1, TCI state#1-2, TCI state#1-3; the second group of TCI states activated for the second cell includes: TCI state#2-1, TCI state#2-2, TCI state#2-3. For example, the source cell includes the first MAC CE and the second MAC CE in the same MAC PDU and sends it to the terminal device at time t, and the terminal device receives the first MAC CE and the second MAC CE at the same time.

[0125] For example, as shown in Figure 5B, the source cell needs to send a first MAC CE and a second MAC CE to activate the first group of TCI states for the first cell and the second group of TCI states for the second cell, respectively. For example, as shown in Figure 5B, the first group of TCI states activated for the first cell includes: TCI state#1-1, TCI state#1-2, TCI state#1-3; the second group of TCI states activated for the second cell includes: TCI state#2-1, TCI state#2-2, TCI state#2-3. For example, the source cell includes the first MAC CE and the second MAC CE in the first MAC PDU and the second MAC PDU, respectively, and sends them to the terminal device at time t1 and time t2, respectively. The terminal device first receives the first MAC CE (first MAC PDU) and then receives the second MAC CE (second MAC PDU).

[0126] Thus, the terminal device is able to receive and store TCI states activated for multiple candidate cells.

[0127] In some embodiments, the method further includes: after receiving the first indication signaling, not deactivating the second set of TCI states; and / or after receiving the second indication signaling, not deactivating the first set of TCI states.

[0128] For example, a MAC CE activates the TCI state for a candidate cell (the candidate cell indicated by the field of the MAC CE) without affecting other candidate cells. For example, since the first MAC CE and the second MAC CE activate the TCI state for different candidate cells, the first MAC CE will not deactivate the second set of TCI states activated by the second MAC CE for the second cell. Similarly, the second MAC CE will not deactivate the first set of TCI states activated by the first MAC CE for the first cell.

[0129] Therefore, after receiving the first MAC CE, the terminal device retains the first set of TCI states, and after receiving the second MAC CE, retains the second set of TCI states, and will not affect the TCI states activated by other candidate cells.

[0130] In some embodiments, the method further includes: receiving a third indication signaling before receiving the first indication signaling, wherein the third indication signaling activates a third group of TCI states for the first cell, and deactivates the third group of TCI states after receiving the first indication signaling; and / or, receiving a fourth indication signaling before receiving the second indication signaling, wherein the fourth indication signaling activates a fourth group of TCI states for the second cell, and deactivates the fourth group of TCI states after receiving the second indication signaling.

[0131] In some embodiments, the third group of transmission configuration indication states (TCI states) and / or the fourth group of transmission configuration indication states (TCI states) include at least: at least one joint transmission configuration indication state (TCI state), or at least one downlink transmission configuration indication state (TCI state) and / or at least one uplink transmission configuration indication state (TCI state).

[0132] In some embodiments, the third indication signaling and / or the fourth indication signaling is carried by at least one of the following signaling: media access control element (MAC CE) signaling, downlink control information (DCI) signaling, or radio resource control (RRC) signaling.

[0133] For example, the third indication signaling and / or the fourth indication signaling is also MAC CE signaling, and the third indication signaling and / or the fourth indication signaling activates the third group of TCI states and / or the fourth group of TCI states for the first cell and / or the second cell.

[0134] For example, when the value of the unifiedTCI-StateType parameter of the first cell and / or the second cell is 'joint', the third group of TCI states and / or the fourth group of TCI states include, for example, 8 joint TCI states. For example, when the value of the unifiedTCI-StateType parameter of the first cell and / or the second cell is 'separate', the third group of TCI states and / or the fourth group of TCI states include, for example, "8 downlink TCI states and 8 uplink TCI states" (i.e., 8 pairs of TCI states).

[0135] For example, the terminal device receives two MAC CEs that activate the TCI state for the same candidate cell in sequence. The later received MAC CE deactivates the TCI state activated by the first received MAC CE, and the terminal device retains the TCI state activated by the later received MAC CE. The following examples illustrate the "third indication signaling" and "fourth indication signaling" respectively:

[0136] Figure 6A is an example diagram of the first indication signaling, the third indication signaling, and the cell switching command in an embodiment of the present application; Figure 6B is an example diagram of the second indication signaling, the fourth indication signaling, and the cell switching command in an embodiment of the present application.

[0137] For example, the first indication signaling is MAC CE signaling, and the first MAC CE refers to the first indication signaling; the second indication signaling is MAC CE signaling, and the second MAC CE refers to the second indication signaling; the third indication signaling is MAC CE signaling, and the third MAC CE refers to the third indication signaling; the fourth indication signaling is MAC CE signaling, and the fourth MAC CE refers to the fourth indication signaling.

[0138] For example, as shown in Figure 6A, the terminal device first receives a third MAC CE activating a third group of TCI states for the first cell, and then receives a first MAC CE activating a first group of TCI states for the first cell. The first MAC CE deactivates the third group of TCI states. For example, as shown in Figure 6A, the third group of TCI states activated for the first cell includes: TCI state#1-4, TCI state#1-5, TCI state#1-6; the first group of TCI states activated for the first cell includes: TCI state#1-1, TCI state#1-2, and TCI state#1-3.

[0139] For example, the first MAC CE and the third MAC CE indicate the same candidate cell, so after receiving the first MAC CE, the terminal device retains the first group of TCI states and deactivates the third group of TCI states.

[0140] For example, as shown in Figure 6B , the terminal device first receives a fourth MAC CE activating the fourth group of TCI states for the second cell, and then receives a second MAC CE activating the second group of TCI states for the second cell. The second MAC CE deactivates the fourth group of TCI states. For example, as shown in Figure 6B , the fourth group of TCI states activated for the second cell includes: TCI state #2-4, TCI state #2-5, and TCI state #2-6; the second group of TCI states activated for the second cell includes: TCI state #2-1, TCI state #2-2, and TCI state #2-3.

[0141] For example, the second MAC CE and the fourth MAC CE indicate the same candidate cell, so after receiving the second MAC CE, the terminal device retains the second group of TCI states and deactivates the fourth group of TCI states.

[0142] As a result, the terminal device retains the most recently activated TCI state, can track beam changes more promptly, and ensure that a better beam is always used for data transmission with the target cell.

[0143] In some embodiments, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is a subset of the first group of transmission configuration indication states (TCI states), the terminal device further receives a fifth indication signaling after receiving the cell switching command, wherein the fifth indication signaling activates a fifth group of transmission configuration indication states (TCI states) for the target cell, and after receiving the fifth indication signaling, the terminal device deactivates the first group of transmission configuration indication states (TCI states).

[0144] In some embodiments, the fifth group of transmission configuration indication states (TCI states) includes at least: at least one joint transmission configuration indication state (TCI state), or at least one downlink transmission configuration indication state (TCI state) and / or at least one uplink transmission configuration indication state (TCI state). For example, the fifth indication signaling is also MAC CE signaling.

[0145] For example, when the unifiedTCI-StateType parameter value of the target cell is 'joint', the fifth group of TCI states includes, for example, 8 joint TCI states. For example, when the unifiedTCI-StateType parameter value of the target cell is 'separate', the fifth group of TCI states includes, for example, "8 downlink TCI states and 8 uplink TCI states" (i.e., 8 pairs of TCI states).

[0146] In some implementations, the fifth indication signaling is carried by at least one of the following signalings: media access control element (MAC CE) signaling, downlink control information (DCI) signaling, or radio resource control (RRC) signaling.

[0147] FIG7 is an example diagram of the fifth indication signaling according to an embodiment of the present application.

[0148] For example, the first indication signaling is MAC CE signaling, and the first MAC CE is used to refer to the first indication signaling; the fifth indication signaling is MAC CE signaling, and the fifth MAC CE is used to refer to the fifth indication signaling.

[0149] For example, as shown in Figure 7, when the target cell is the first cell, when the cell switching command instructs the terminal device to switch to the target cell, and when the first TCI state (TCI state#2) indicated by the cell switching command is a subset of the first group of TCI states (TCI state#1, TCI state#2 and TCI state#3), the terminal device retains the first group of TCI states after the cell switching command; thereafter, the terminal device also receives the fifth MAC CE, which activates the fifth group of TCI states (TCI state#7, TCI state#8 and TCI state#9) for the first cell (target cell), and the terminal device deactivates the first group of TCI states and retains the fifth group of TCI states.

[0150] For example, after the terminal device receives the cell switching command and before receiving the fifth MAC CE, if the terminal device receives a DCI indicating a TCI state (a first DCI), the first DCI indicates a TCI state in the first group of TCI states (for example, indicating TCI state#1). For example, after the terminal device receives the fifth MAC CE, if the terminal device receives a DCI indicating a TCI state (a second DCI), the second DCI indicates a TCI state in the fifth group of TCI states (for example, indicating TCI state#8). For example, the fifth MAC CE and the first MAC CE are different MAC CE formats, the fifth MAC CE is a MAC CE for activating the TCI state for the serving cell (for example, a MAC CE defined for Rel-17 unified TCI), and the first MAC CE is a MAC CE for activating the TCI state for the candidate cell (for example, a MAC CE defined for Rel-18 LTM).

[0151] Therefore, when the target cell is the first cell, even if different groups of TCI states are activated for the first cell at different times (before or after the time of receiving the cell switching command), the TCI state applied by the terminal device on the service cell can be clarified, thereby clarifying the user behavior of the terminal device, which is conducive to the terminal device successfully completing the data transmission after the cell switching, thereby helping to improve the reliability or throughput of data transmission.

[0152] In some embodiments, the fifth group of transmission configuration indication states (TCI states) and the first group of transmission configuration indication states (TCI states) belong to different transmission configuration indication state (TCI state) pools (TCI state pools) of the target cell.

[0153] For example, the fifth group of TCI states belongs to the TCI state set configured for the serving cell (the TCI state set can also be called a "TCI state pool" or a "TCI state list"). For example, the TCI state pool configured for the serving cell exists in the RRC reconfiguration message. The terminal device can read the RRC reconfiguration message after the cell switching command to obtain the TCI state pool configured for the serving cell. A capable terminal device can read the RRC reconfiguration message before the cell switching command. The TCI state pool configured for the serving cell is only used after the cell switching command.

[0154] For example, the first group of TCI states belongs to the TCI state set configured for the candidate cell (the TCI state set can also be called "TCI state pool" or "TCI state list"). The TCI state pool configured for the candidate cell exists in the candidate cell configuration. The terminal device can obtain the TCI state pool configured for the candidate cell before the cell switching command. The TCI state pool configured for the candidate cell can be used before the cell switching command. For example, the TCI states activated before the cell switching command are all TCI states in the TCI state pool.

[0155] Table 1 schematically illustrates the configuration information of the "TCI state pool configured for the serving cell" and the "TCI state pool configured for the candidate cell". As shown in Table 1, the parameter "LTM-Candidate-r18" provides configuration information of a candidate cell and a serving cell.

[0156] For example, in the parameter "LTM-Candidate-r18," the parameter "ltm-CandidateConfig-r18" provides the terminal device with the necessary RRC configuration required in the new serving cell after cell handover via an RRC reconfiguration message, wherein the RRC reconfiguration message includes the TCI state pool (the first TCI state pool). For example, after the cell handover command, the fifth MAC CE activates the TCI state in the first TCI state pool.

[0157] For example, in the parameter "LTM-Candidate-r18", the parameter "ltm-DL-OrJointTCI-StateToAddModList-r18" or the parameter "ltm-UL-TCI-ToAddModList-r18" provides the terminal device with the TCI state pool (second TCI state pool) of candidate cells for LTM cell switching. For example, before the cell switching command, the first MAC CE activates the TCI state in the second TCI state pool.

[0158] Table 1

[0159] Therefore, when the target cell is the first cell, after the terminal device completes the cell switching, it can apply the TCI state belonging to the different TCI state pool in the new service cell (target cell), so that it can track the changes in the beam more timely and ensure that a better beam is always used for data transmission with the target cell.

[0160] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0161] It can be seen from the above embodiment that the terminal device receives a first indication signaling, wherein the first indication signaling activates a first group of TCI states for a first cell; the terminal device receives a cell switching command after receiving the first indication signaling, wherein the cell switching command instructs the terminal device to switch to a target cell, and the cell switching command indicates a first TCI state, wherein, in the case where the target cell is the first cell and the first TCI state is not a subset of the first group of TCI states, the terminal device deactivates the first group of TCI states. Thus, in the case where the first TCI state indicated by the cell switching command is not a subset of the first group of TCI states that was previously activated, the terminal device deactivates the activated first group of TCI states, which can clarify the behavior of the terminal device, reduce the complexity of the terminal device, save storage space of the terminal device, and is also beneficial for the terminal device to successfully complete the cell switching and data transmission after the switching, thereby improving the reliability or throughput of data transmission.

[0162] Embodiments of the second aspect

[0163] The embodiment of the present application provides a data transmission method, which is applied to a network device. The embodiment of the present application can be combined with the embodiment of the first aspect, or can be implemented independently. The contents that are the same as those of the embodiment of the first aspect are not repeated here.

[0164] FIG8 is a schematic diagram of a data sending method according to an embodiment of the present application. As shown in FIG8 , the method includes:

[0165] 801. A network device sends a first indication signaling, where the first indication signaling activates a first group of TCI states for a first cell.

[0166] 802. The network device sends a cell switching command after sending the first indication signaling, wherein the cell switching command indicates that the terminal device switches to the target cell, and the cell switching command indicates a first TCI state; wherein, when the target cell is the first cell and the first TCI state is not a subset of the first group of TCI states, the terminal device deactivates the first group of TCI states.

[0167] Therefore, when the first TCI state indicated by the cell switching command is not a subset of the first group of TCI states previously activated, the terminal device deactivates the activated first group of TCI states, which can clarify the behavior of the terminal device, reduce the complexity of the terminal device, save the storage space of the terminal device, and also help the terminal device to successfully complete the cell switching and data transmission after the switching, thereby improving the reliability or throughput of data transmission.

[0168] In some embodiments, the method further includes: sending a second indication signaling before sending the cell switching command, wherein the second indication signaling activates a second group of TCI states for the second cell; wherein the second indication signaling and the first indication signaling are included in the same protocol data unit (MAC Protocol Data Unit, MAC PDU), or, are included in different protocol data units (MAC Protocol Data Unit, MAC PDU).

[0169] In some implementations, the second indication signaling is sent before sending the first indication signaling, after sending the first indication signaling, or when sending the first indication signaling.

[0170] In some embodiments, the method further includes: sending a third indication signaling before sending the first indication signaling, wherein the third indication signaling activates a third group of TCI states for the first cell, and after sending the first indication signaling, the terminal device deactivates the third group of TCI states; and / or, sending a fourth indication signaling before sending the second indication signaling, wherein the fourth indication signaling activates a fourth group of TCI states for the second cell, and after sending the second indication signaling, the terminal device deactivates the fourth group of TCI states.

[0171] In some embodiments, the method further includes: when the target cell is the first cell and the first transmission configuration indication state (TCI state) is a subset of the first group of transmission configuration indication states (TCI states), further sending a fifth indication signaling after sending the cell switching command, wherein the fifth indication signaling activates a fifth group of transmission configuration indication states (TCI states) for the target cell, and after the terminal device receives the fifth indication signaling, the terminal device deactivates the first group of transmission configuration indication states (TCI states).

[0172] It is worth noting that FIG8 above is merely a schematic illustration of an embodiment of the present application, and the present application is not limited thereto. For example, the execution order of the various operations may be appropriately adjusted, and other operations may be added or some operations may be reduced. Those skilled in the art may make appropriate modifications based on the above description, and are not limited to the description of FIG8 above.

[0173] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0174] It can be seen from the above embodiment that the terminal device receives a first indication signaling, wherein the first indication signaling activates a first group of TCI states for a first cell; the terminal device receives a cell switching command after receiving the first indication signaling, wherein the cell switching command instructs the terminal device to switch to a target cell, and the cell switching command indicates a first TCI state, wherein, in the case where the target cell is the first cell and the first TCI state is not a subset of the first group of TCI states, the terminal device deactivates the first group of TCI states. Thus, in the case where the first TCI state indicated by the cell switching command is not a subset of the first group of TCI states that was previously activated, the terminal device deactivates the activated first group of TCI states, which can clarify the behavior of the terminal device, reduce the complexity of the terminal device, save storage space of the terminal device, and is also beneficial for the terminal device to successfully complete the cell switching and data transmission after the switching, thereby improving the reliability or throughput of data transmission.

[0175] Embodiments of the third aspect

[0176] The embodiment of the present application provides a data receiving device, which may be, for example, a terminal device, or one or more components or assemblies configured in the terminal device; in addition, the same contents as those in the embodiment of the first aspect are not repeated here.

[0177] FIG9 is a schematic diagram of a data receiving device according to an embodiment of the present application. As shown in FIG9 , the data receiving device 900 includes:

[0178] A receiving unit 901 receives a first indication signaling, wherein the first indication signaling is activation of a first group transmission configuration indication state (TCI state) for a first cell;

[0179] The receiving unit 901 receives a cell handover command after receiving the first indication signaling, wherein the cell handover command instructs the terminal device to switch to the target cell, and the cell handover command indicates a first transmission configuration indication state (TCI state);

[0180] In which, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is not a subset of the first group of transmission configuration indication states (TCI states), the terminal device deactivates the first group of transmission configuration indication states (TCI states).

[0181] Therefore, when the first TCI state indicated by the cell switching command is not a subset of the first group of TCI states previously activated, the terminal device deactivates the activated first group of TCI states, which can clarify the behavior of the terminal device, reduce the complexity of the terminal device, save the storage space of the terminal device, and also help the terminal device to successfully complete the cell switching and data transmission after the switching, thereby improving the reliability or throughput of data transmission.

[0182] In some implementations, the data receiving apparatus 900 further includes: an application unit 902, which applies the first transmission configuration indication state (TCI state) in the target cell after receiving the cell handover command.

[0183] In some embodiments, the data receiving device 900 further includes: a cache unit 903, which, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is a subset of the first group of transmission configuration indication states (TCI states), retains the first group of transmission configuration indication states (TCI states) after receiving the cell switching command.

[0184] In some embodiments, the receiving unit 901 further receives a second indication signaling before receiving the cell switching command, wherein the second indication signaling activates a second group transmission configuration indication state (TCI state) for the second cell; wherein the second indication signaling and the first indication signaling are included in the same protocol data unit (MAC Protocol Data Unit, MAC PDU), or the second indication signaling and the first indication signaling are included in different protocol data units (MAC Protocol Data Unit, MAC PDU).

[0185] In some embodiments, after receiving the first indication signaling, the receiving unit 901 does not deactivate the second group of transmission configuration indication states (TCI states); and / or, after receiving the second indication signaling, the receiving unit 901 does not deactivate the first group of transmission configuration indication states (TCI states).

[0186] In some implementations, the receiving unit 901 receives the second indication signaling before receiving the first indication signaling, after receiving the first indication signaling, or when receiving the first indication signaling.

[0187] In some embodiments, the receiving unit 901 also receives a third indication signaling before receiving the first indication signaling, wherein the third indication signaling activates a third group of transmission configuration indication states (TCI state) for the first cell, and deactivates the third group of transmission configuration indication states (TCI state) after receiving the first indication signaling; and / or, the receiving unit 901 also receives a fourth indication signaling before receiving the second indication signaling, wherein the fourth indication signaling activates a fourth group of transmission configuration indication states (TCI state) for the second cell, and deactivates the fourth group of transmission configuration indication states (TCI state) after receiving the second indication signaling.

[0188] In some embodiments, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is a subset of the first group of transmission configuration indication states (TCI states), the receiving unit 901 further receives a fifth indication signaling after receiving the cell switching command, wherein the fifth indication signaling activates a fifth group of transmission configuration indication states (TCI states) for the target cell, and after receiving the fifth indication signaling, the terminal device deactivates the first group of transmission configuration indication states (TCI states).

[0189] In some embodiments, the fifth group of transmission configuration indication states (TCI states) and the first group of transmission configuration indication states (TCI states) belong to different transmission configuration indication state (TCI state) pools (TCI state pools) of the target cell.

[0190] In some embodiments, the first transmission configuration indication state (TCI state) includes at least: a joint transmission configuration indication state (TCI state), or a downlink transmission configuration indication state (TCI state) and an uplink transmission configuration indication state (TCI state).

[0191] In some embodiments, the first group of transmission configuration indication states (TCI states) includes at least: at least one joint transmission configuration indication state (TCI state), or at least one downlink transmission configuration indication state (TCI state) and / or at least one uplink transmission configuration indication state (TCI state).

[0192] In some embodiments, the second group of transmission configuration indication states (TCI states), and / or the third group of transmission configuration indication states (TCI states), and / or the fourth group of transmission configuration indication states (TCI states) include at least: at least one joint transmission configuration indication state (TCI state), or at least one downlink transmission configuration indication state (TCI state) and / or at least one uplink transmission configuration indication state (TCI state).

[0193] In some embodiments, the first indication signaling is carried by at least one of the following signaling: media access control element (MAC CE) signaling, downlink control information (DCI) signaling, or radio resource control (RRC) signaling.

[0194] In some embodiments, the second indication signaling, and / or the third indication signaling and / or the fourth indication signaling are carried by at least one of the following signaling: media access control element (MAC CE) signaling, downlink control information (DCI) signaling, or radio resource control (RRC) signaling.

[0195] In some implementations, the cell switching command is carried via Media Access Control Element (MAC CE) signaling.

[0196] In some implementations, the first cell includes at least a target cell or a candidate cell.

[0197] In some embodiments, the second cell includes at least a candidate cell, and the second cell and the first cell are different cells.

[0198] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0199] It is worth noting that the above description only describes the components or modules related to the present application, but the present application is not limited thereto. The data receiving device 900 may also include other components or modules. For details of these components or modules, reference may be made to related technologies.

[0200] In addition, for the sake of simplicity, FIG9 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0201] It can be seen from the above embodiment that the terminal device receives a first indication signaling, wherein the first indication signaling activates a first group of TCI states for a first cell; the terminal device receives a cell switching command after receiving the first indication signaling, wherein the cell switching command instructs the terminal device to switch to a target cell, and the cell switching command indicates a first TCI state, wherein, in the case where the target cell is the first cell and the first TCI state is not a subset of the first group of TCI states, the terminal device deactivates the first group of TCI states. Thus, in the case where the first TCI state indicated by the cell switching command is not a subset of the first group of TCI states that was previously activated, the terminal device deactivates the activated first group of TCI states, which can clarify the behavior of the terminal device, reduce the complexity of the terminal device, save storage space of the terminal device, and is also beneficial for the terminal device to successfully complete the cell switching and data transmission after the switching, thereby improving the reliability or throughput of data transmission.

[0202] Embodiments of the fourth aspect

[0203] The embodiment of the present application provides a data transmission device, which may be, for example, a network device, or one or more components or assemblies configured in the network device; in addition, the same contents as those in the embodiment of the first aspect are not repeated here.

[0204] FIG10 is a schematic diagram of a data transmission device according to an embodiment of the present application. As shown in FIG10 , the data transmission device 1000 includes:

[0205] A sending unit 1001 sends a first indication signaling, wherein the first indication signaling is activation of a first group transmission configuration indication state (TCI state) for a first cell;

[0206] The sending unit 1001 sends a cell handover command after sending the first indication signaling, wherein the cell handover command indicates that the terminal device switches to the target cell, and the cell handover command indicates a first transmission configuration indication state (TCI state);

[0207] In which, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is not a subset of the first group of transmission configuration indication states (TCI states), the terminal device deactivates the first group of transmission configuration indication states (TCI states).

[0208] Therefore, when the first TCI state indicated by the cell switching command is not a subset of the first group of TCI states previously activated, the terminal device deactivates the activated first group of TCI states, which can clarify the behavior of the terminal device, reduce the complexity of the terminal device, save the storage space of the terminal device, and also help the terminal device to successfully complete the cell switching and data transmission after the switching, thereby improving the reliability or throughput of data transmission.

[0209] In some embodiments, the sending unit 1001 also sends a second indication signaling before sending the cell switching command, wherein the second indication signaling activates a second group of transmission configuration indication state (TCI state) for the second cell; wherein the second indication signaling and the first indication signaling are included in the same protocol data unit (MAC Protocol Data Unit, MAC PDU), or, are included in different protocol data units (MAC Protocol Data Unit, MAC PDU).

[0210] In some implementations, the sending unit 1001 sends the second indication signaling before sending the first indication signaling or after sending the first indication signaling.

[0211] In some embodiments, the sending unit 1001 also sends a third indication signaling before sending the first indication signaling, wherein the third indication signaling activates a third group of transmission configuration indication state (TCI state) for the first cell, and after sending the first indication signaling, the terminal device deactivates the third group of transmission configuration indication state (TCI state); and / or, the sending unit 1001 also sends a fourth indication signaling before sending the second indication signaling, wherein the fourth indication signaling activates a fourth group of transmission configuration indication state (TCI state) for the second cell, and after sending the second indication signaling, the terminal device deactivates the fourth group of transmission configuration indication state (TCI state).

[0212] In some embodiments, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is a subset of the first group of transmission configuration indication states (TCI states), the sending unit 1001 further sends a fifth indication signaling after sending the cell switching command, wherein the fifth indication signaling activates a fifth group of transmission configuration indication states (TCI states) for the target cell, and after the terminal device receives the fifth indication signaling, the terminal device deactivates the first group of transmission configuration indication states (TCI states).

[0213] In some implementations, the sending unit 1001 sends the second indication signaling before sending the first indication signaling, after sending the first indication signaling, or when sending the first indication signaling.

[0214] The above embodiments are merely exemplary of the present invention, but the present invention is not limited thereto. Appropriate modifications may be made based on the above embodiments. For example, the above embodiments may be used alone, or one or more of the above embodiments may be combined.

[0215] It is worth noting that the above description only describes the components or modules related to the present application, but the present application is not limited thereto. The data sending device 1000 may also include other components or modules. For the specific contents of these components or modules, reference may be made to the relevant art.

[0216] In addition, for the sake of simplicity, FIG10 only illustrates the connection relationship or signal direction between various components or modules. However, it should be clear to those skilled in the art that various related technologies such as bus connection can be used. The above-mentioned components or modules can be implemented by hardware facilities such as processors, memories, transmitters, and receivers; the implementation of this application is not limited to this.

[0217] It can be seen from the above embodiment that the terminal device receives a first indication signaling, wherein the first indication signaling activates a first group of TCI states for a first cell; the terminal device receives a cell switching command after receiving the first indication signaling, wherein the cell switching command instructs the terminal device to switch to a target cell, and the cell switching command indicates a first TCI state, wherein, in the case where the target cell is the first cell and the first TCI state is not a subset of the first group of TCI states, the terminal device deactivates the first group of TCI states. Thus, in the case where the first TCI state indicated by the cell switching command is not a subset of the first group of TCI states that was previously activated, the terminal device deactivates the activated first group of TCI states, which can clarify the behavior of the terminal device, reduce the complexity of the terminal device, save storage space of the terminal device, and is also beneficial for the terminal device to successfully complete the cell switching and data transmission after the switching, thereby improving the reliability or throughput of data transmission.

[0218] Embodiments of the fifth aspect

[0219] An embodiment of the present application also provides a communication system, and reference may be made to FIG1 . The contents identical to those in the embodiments of the first to fourth aspects will not be repeated here.

[0220] In some embodiments, the communication system 100 may include at least:

[0221] A network device, sending a first indication signaling, wherein the first indication signaling activates a first group of transmission configuration indication states (TCI states) for a first cell; and the network device sending a cell handover command after sending the first indication signaling, wherein the cell handover command indicates that the terminal device switches to a target cell, and the cell handover command indicates the first transmission configuration indication state (TCI state);

[0222] A terminal device that receives the first indication signaling and receives a cell switching command after receiving the first indication signaling; wherein, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is not a subset of the first group of transmission configuration indication states (TCI states), the terminal device deactivates the first group of transmission configuration indication states (TCI states).

[0223] Therefore, when the first TCI state indicated by the cell switching command is not a subset of the first group of TCI states previously activated, the terminal device deactivates the activated first group of TCI states, which can clarify the behavior of the terminal device, reduce the complexity of the terminal device, save the storage space of the terminal device, and also help the terminal device to successfully complete the cell switching and data transmission after the switching, thereby improving the reliability or throughput of data transmission.

[0224] An embodiment of the present application further provides a network device, which may be, for example, a base station, but the present application is not limited thereto and may also be other network devices.

[0225] Figure 11 is a schematic diagram illustrating the structure of a network device according to an embodiment of the present application. As shown in Figure 11 , network device 1100 may include a processor 1110 (e.g., a central processing unit (CPU)) and a memory 1120 ; the memory 1120 is coupled to the processor 1110 . The memory 1120 may store various data and may also store an information processing program 1130 , which is executed under the control of the processor 1110 .

[0226] In addition, as shown in FIG11 , the network device 1100 may further include: a transceiver 1140 and an antenna 1150, etc.; wherein, the functions of the above components are similar to those in the prior art and are not described in detail here. It is worth noting that the network device 1100 does not necessarily include all the components shown in FIG11 ; in addition, the network device 1100 may also include components not shown in FIG11 , and reference may be made to the prior art for details.

[0227] The embodiment of the present application also provides a terminal device, but the present application is not limited thereto and may also be other devices.

[0228] Figure 12 is a schematic diagram of a terminal device according to an embodiment of the present application. As shown in Figure 12 , terminal device 1200 may include a processor 1210 and a memory 1220. Memory 1220 stores data and programs and is coupled to processor 1210. It should be noted that this diagram is exemplary; other types of structures may be used to supplement or replace this structure to implement telecommunication or other functions.

[0229] For example, the processor 1210 may be configured to execute a program to implement the uplink data sending method as described in the embodiment of the first aspect. For example, the processor 1210 may be configured to perform the following control: the terminal device receives a first indication signaling, wherein the first indication signaling activates a first group of TCI states for a first cell; the terminal device receives a cell handover command after receiving the first indication signaling, wherein the cell handover command instructs the terminal device to switch to a target cell, and the cell handover command indicates a first TCI state; wherein, if the target cell is the first cell and the first TCI state is not a subset of the first group of TCI states, the terminal device deactivates the first group of TCI states.

[0230] As shown in Figure 12 , the terminal device 1200 may further include: a communication module 1230, an input unit 1240, a display 1250, and a power supply 1260. The functions of these components are similar to those in the prior art and are not described in detail here. It is worth noting that the terminal device 1200 does not necessarily include all of the components shown in Figure 12 , and these components are not essential. Furthermore, the terminal device 1200 may also include components not shown in Figure 12 , for which reference may be made to the prior art.

[0231] An embodiment of the present application also provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the data sending method described in the embodiment of the first aspect.

[0232] An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the data sending method described in the embodiment of the first aspect.

[0233] An embodiment of the present application also provides a computer program, wherein when the program is executed in a terminal device, the program causes the terminal device to execute the data receiving method described in the embodiment of the second aspect.

[0234] An embodiment of the present application also provides a storage medium storing a computer program, wherein the computer program enables a terminal device to execute the data receiving method described in the embodiment of the second aspect.

[0235] The above devices and methods of the present application can be implemented by hardware or by a combination of hardware and software. The present application relates to such a computer-readable program that, when executed by a logic component, enables the logic component to implement the devices or components described above, or enables the logic component to implement the various methods or steps described above. The present application also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, etc.

[0236] The method / device described in conjunction with the embodiments of the present application can be directly embodied as hardware, a software module executed by a processor, or a combination of the two. For example, one or more of the functional block diagrams shown in the figure and / or one or more combinations of functional block diagrams can correspond to various software modules of the computer program flow or to various hardware modules. These software modules can respectively correspond to the various steps shown in the figure. These hardware modules can be implemented by solidifying these software modules, for example, using a field programmable gate array (FPGA).

[0237] The software module may be located in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. A storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium; or the storage medium may be an integral part of the processor. The processor and the storage medium may be located in an ASIC. The software module may be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal. For example, if the device (such as a mobile terminal) uses a large-capacity MEGA-SIM card or a large-capacity flash memory device, the software module may be stored in the MEGA-SIM card or the large-capacity flash memory device.

[0238] One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may be implemented as a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic device, a discrete hardware component, or any appropriate combination thereof for performing the functions described in this application. One or more of the functional blocks and / or one or more combinations of functional blocks described in the accompanying drawings may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in communication with a DSP, or any other such configuration.

[0239] The present application has been described above in conjunction with specific embodiments. However, those skilled in the art should understand that these descriptions are merely illustrative and are not intended to limit the scope of protection of the present application. Those skilled in the art may make various modifications and variations to the present application based on the spirit and principles of the present application, and such modifications and variations are also within the scope of the present application.

[0240] Regarding the implementation methods including the above embodiments, the following additional notes are also disclosed:

[0241] 1. A communication system comprising:

[0242] A network device, sending a first indication signaling, wherein the first indication signaling activates a first group of transmission configuration indication states (TCI states) for a first cell; and the network device sending a cell handover command after sending the first indication signaling, wherein the cell handover command indicates that the terminal device switches to a target cell, and the cell handover command indicates the first transmission configuration indication state (TCI state);

[0243] A terminal device, which receives the first indication signaling, and receives a cell handover command after receiving the first indication signaling;

[0244] In which, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is not a subset of the first group of transmission configuration indication states (TCI states), the terminal device deactivates the first group of transmission configuration indication states (TCI states).

[0245] 2. The communication system according to Note 1, wherein the network device sends the second indication signaling before sending the first indication signaling, after sending the first indication signaling, or when sending the first indication signaling.

Claims

1. A data receiving device, configured in a terminal device, wherein: The data receiving device comprises: A receiving unit, which receives a first indication signaling, wherein the first indication signaling is a first group transmission configuration indication state (TCI state) activated by a first cell; The receiving unit receives a cell switching command after receiving the first indication signaling, wherein the cell switching command instructs the terminal device to switch to a target cell, and the cell switching command indicates a first transmission configuration indication state (TCI state); In which, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is not a subset of the first group of transmission configuration indication states (TCI states), the terminal device deactivates the first group of transmission configuration indication states (TCI states).

2. The device according to claim 1, wherein: The data receiving device also includes: An application unit, which applies the first transmission configuration indication state (TCI state) in the target cell after receiving the cell switching command.

3. The device according to claim 1, wherein: The data receiving device also includes: A cache unit, which retains the first group of transmission configuration indication states (TCI states) after receiving the cell switching command when the target cell is the first cell and the first transmission configuration indication state (TCI state) is a subset of the first group of transmission configuration indication states (TCI states).

4. The device according to claim 1, wherein: The receiving unit also receives a second indication signaling before receiving the cell switching command, wherein the second indication signaling activates a second group transmission configuration indication state (TCI state) for the second cell; wherein the second indication signaling and the first indication signaling are included in the same protocol data unit (MAC Protocol Data Unit, MAC PDU), or the second indication signaling and the first indication signaling are included in different protocol data units (MAC Protocol Data Unit, MAC PDU).

5. The device according to claim 4, wherein: After receiving the first indication signaling, the receiving unit does not activate the second group of transmission configuration indication state (TCI state); and / or, after receiving the second indication signaling, the receiving unit does not activate the first group of transmission configuration indication state (TCI state).

6. The device according to claim 4, wherein: The receiving unit receives the second indication signaling before receiving the first indication signaling, after receiving the first indication signaling, or when receiving the first indication signaling.

7. The device according to claim 4, wherein: The receiving unit further receives a third indication signaling before receiving the first indication signaling, wherein the third indication signaling activates a third group of transmission configuration indication state (TCI state) for the first cell, and deactivates the third group of transmission configuration indication state (TCI state) after receiving the first indication signaling; and / or, The receiving unit also receives a fourth indication signaling before receiving the second indication signaling, wherein the fourth indication signaling activates a fourth group of transmission configuration indication state (TCI state) for the second cell, and deactivates the fourth group of transmission configuration indication state (TCI state) after receiving the second indication signaling.

8. The device according to claim 3, wherein: In a case where the target cell is the first cell and the first transmission configuration indication state (TCI state) is a subset of the first group of transmission configuration indication states (TCI states), the receiving unit further receives a fifth indication signaling after receiving the cell switching command, wherein the fifth indication signaling activates a fifth group of transmission configuration indication states (TCI states) for the target cell, and after receiving the fifth indication signaling, the terminal device deactivates the first group of transmission configuration indication states (TCI states).

9. The device according to claim 8, wherein: The fifth group of transmission configuration indication states (TCI states) and the first group of transmission configuration indication states (TCI states) belong to different transmission configuration indication state (TCI state) sets (TCI state pools) of the target cell.

10. The device according to claim 1, wherein: The first transmission configuration indication state (TCI state) includes at least: a joint transmission configuration indication state (TCI state), or a downlink transmission configuration indication state (TCI state) and an uplink transmission configuration indication state (TCI state).

11. The device according to claim 1, wherein: The first group of transmission configuration indication states (TCI states) includes at least: at least one joint transmission configuration indication state (TCI state), or at least one downlink transmission configuration indication state (TCI state) and / or at least one uplink transmission configuration indication state (TCI state).

12. The device according to claim 7, wherein: The second group of transmission configuration indication states (TCI state), and / or the third group of transmission configuration indication states (TCI state), and / or the fourth group of transmission configuration indication states (TCI state) at least include: at least one joint transmission configuration indication state (TCI state), or at least one downlink transmission configuration indication state (TCI state) and / or at least one uplink transmission configuration indication state (TCI state).

13. The device according to claim 1, wherein: The first indication signaling is carried by at least one of the following signaling: media access control element (MAC CE) signaling, downlink control information (DCI) signaling, or radio resource control (RRC) signaling.

14. The device according to claim 7, wherein: The second indication signaling, and / or the third indication signaling and / or the fourth indication signaling are carried by at least one of the following signaling: media access control element (MAC CE) signaling, downlink control information (DCI) signaling, or radio resource control (RRC) signaling.

15. The device according to claim 1, wherein: The cell switching command is carried via medium access control element (MAC CE) signaling.

16. The device according to claim 1, wherein The first cell includes at least a target cell or a candidate cell.

17. The device according to claim 4, wherein: The second cell includes at least a candidate cell, and the second cell is a different cell from the first cell.

18. A data sending device, configured in a network device, wherein the data receiving device comprises: A sending unit, which sends a first indication signaling, wherein the first indication signaling is a first group transmission configuration indication state (TCI state) activated by the first cell; The sending unit sends a cell switching command after sending the first indication signaling, wherein the cell switching command indicates that the terminal device switches to a target cell, and the cell switching command indicates a first transmission configuration indication state (TCI state); In which, when the target cell is the first cell and the first transmission configuration indication state (TCI state) is not a subset of the first group of transmission configuration indication states (TCI states), the terminal device deactivates the first group of transmission configuration indication states (TCI states).

19. The device according to claim 18, wherein the sending unit further sends a second indication signaling before sending the cell switching command, wherein: The second indication signaling activates a second group of transmission configuration indication state (TCI state) for the second cell; wherein the second indication signaling and the first indication signaling are included in the same protocol data unit (MAC Protocol Data Unit, MAC PDU), or are included in different protocol data units (MAC Protocol Data Unit, MAC PDU).

20. The device according to claim 19, wherein The sending unit further sends a third indication signaling before sending the first indication signaling, wherein the third indication signaling activates a third group of transmission configuration indication state (TCI state) for the first cell, and after sending the first indication signaling, the terminal device deactivates the third group of transmission configuration indication state (TCI state); and / or, The sending unit also sends a fourth indication signaling before sending the second indication signaling, wherein the fourth indication signaling activates a fourth group of transmission configuration indication state (TCI state) for the second cell, and after sending the second indication signaling, the terminal device deactivates the fourth group of transmission configuration indication state (TCI state).

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